DE102006021025B3 - Surgical fixation device for two bone parts - Google Patents

Surgical fixation device for two bone parts

Info

Publication number
DE102006021025B3
DE102006021025B3 DE200610021025 DE102006021025A DE102006021025B3 DE 102006021025 B3 DE102006021025 B3 DE 102006021025B3 DE 200610021025 DE200610021025 DE 200610021025 DE 102006021025 A DE102006021025 A DE 102006021025A DE 102006021025 B3 DE102006021025 B3 DE 102006021025B3
Authority
DE
Germany
Prior art keywords
fixing device
element
characterized
device according
8th
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE200610021025
Other languages
German (de)
Inventor
Manfred Dworschak
Theodor Lutze
Pedro Morales
Dieter Dipl.-Ing.(FH) Weißhaupt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aesculap AG
Original Assignee
Aesculap AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aesculap AG filed Critical Aesculap AG
Priority to DE200610021025 priority Critical patent/DE102006021025B3/en
Application granted granted Critical
Publication of DE102006021025B3 publication Critical patent/DE102006021025B3/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/688Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin for reattaching pieces of the skull
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/82Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin for bone cerclage
    • A61B17/823Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin for bone cerclage for the sternum

Abstract

In order for a surgical fixation device for mutual fixation of two adjacent bone parts with a first contact element to rest against the underside of the two bone parts and with a second contact element for engaging the top of the two bone parts and with a clamping device, the two contact elements by a gap between connects the bone parts together and the two investment elements permanently fixed against each other fixed, when they rest on the bottom or the top of the bone parts to facilitate the application of the fixing device, it is proposed that the fixing device comprises at least one elastic clamping element, which at the top of the bone parts engageable support surface moves against the first abutment element, so that the support surface and the first abutment element are removable from each other against the force of the elastic clamping element.

Description

  • The The invention relates to a surgical fixation device for mutual Fixation of two adjacent bone parts, with one first contact element for attachment to the underside of the two bone parts and with a second abutment element for attachment to the top of the two bone parts and with a clamping device that the two contact elements by a gap between the bone parts through which connects and the two investment elements permanently clamped against each other when attached to the bottom or the top of the bone parts abut.
  • Such a fixing device is for example from the DE 103 26 690 B4 known. With such fixing two adjacent bone parts, for example, two bone parts of the skull or the sternum, are laterally fixed side by side, leaving between the two bone parts a very narrow gap through which the two contact elements are stretched against each other.
  • Difficult is the creation of such a device, on the one hand, the two Investment elements positioned at the bottom and at the top of the bone parts Need to become and because on the other hand, the two bone parts are combined accordingly have to. Especially when using investment elements that are in a particular Direction must be implanted, for example, at oblong, rectangular investment elements, this can lead to problems.
  • It It is an object of the invention to provide a surgical fixation device generic type so that the Applying the fixing device is facilitated.
  • These Task is in a surgical fixation of the above described type according to the invention thereby solved, that the Fixing device comprises at least one elastic clamping element, which a can be applied to the top of the bone parts support surface against the first contact element moves, so that the support surface and the first contact element removable from each other against the force of the elastic tensioning element are.
  • A such a design makes it possible the surgical fixation device before merging the Bone parts on one of the two bone parts to be determined so that the contact element the right position, but not the bone parts with the final Force against each other.
  • By the elastic tensioning element becomes in this first application of the fixing device on one of the two bone parts, the first contact element to the Bottom of the bone part pulled while leaning against the top this bone part the support surface elastic invests. The support surface and the first contact element thus take the first bone elastic part between them and hold the fixing in this position at the first bone part. It is then possible, the second bone part insert laterally between the first abutment element and the support surface, optionally with elastic widening of the gap between the first contact element and the support surface, and only then are the first contact element and the second contact element finally against each other curious; excited.
  • at a first preferred embodiment The invention provides that the support surface is part of the elastic clamping element is. It can be provided in particular that the support surface before applying the fixing device arranged on the bone parts between the two investment elements is. It is advantageous if the elastic tensioning element with the Fixing device detachable connected is. After the first application of the fixing and after insertion of the second bone part between the first contact element and support surface is it is therefore possible to remove the elastic tensioning element and then the two contact elements finally against each other to tension. The surgical fixation device remains even after the removal of the elastic tensioning element in their Position, be it because of that the first contact element buried in the adjacent bone parts and thereby is fixed, it is because the fact that the surgeon fixation by a suitable handling instrument on the clamping device holds.
  • The elastic clamping element can be particularly advantageous to the clamping device be held.
  • For example may in a preferred embodiment be provided that the Clamping device at least one held on the first contact element and the second contact element has penetrating rod and that the elastic Clamping element is held on this rod.
  • Especially it can be held at the free end of this rod.
  • at a modified embodiment has the tensioning device two adjacent bars on and the elastic tensioning element comprises a connecting the two rods Bridge.
  • Farther the tensioning element can carry at least one clamping element which releasably fixes the tensioning element to the rod or rods. The clamping element Hold that elastic tensioning element on the rod or on the bars that the elastic Mutual clamping of support surface on the one hand and first contact element on the other hand is guaranteed, nevertheless However, the clamping force only so great that the elastic clamping element from the staff or bars can be deducted when the contact elements are stretched against each other should.
  • at a preferred embodiment the clamping element a the support surface and the Connecting joint with the clamping device, laterally on the second contact element guided by spring arm.
  • The Clamping element can carry a clamping device superior handle, so that the surgeon take the elastic clamping element on this handle and, where appropriate remove the elastic tensioning element before tensioning the contact elements can.
  • at a further preferred embodiment is provided that the elastic tensioning element is supported on the second contact element.
  • Especially can the elastic tensioning element applied to the bone parts Fixing device laterally between the top of the bone parts and the underside of the second abutment element is inserted and laterally be pushed out again. In this case, that is elastic clamping element not permanently with the fixing device but formed as a separate part that between the second contact element and the top of the bone parts inserted and thereby the fixing device resilient in the abutment position holds.
  • Especially the elastic tensioning element may be a bow spring, but it would be also possible, in all embodiments to use other types of springs, such as coil springs, Disc springs, upholstery made of elastic material, etc.
  • Especially It is advantageous if the bow spring U-shaped is formed with a support surface forming first arm, an attachable to the second contact element second Arm and with a connecting the two arms resilient bridge.
  • A especially cheap Arrangement results when the clamping device at least one on held first contact element and passing through the second contact element Rod and if the clamping element on both sides of the rod or the bars is arranged. In this way, one results in the same way elastic prefixing of the fixing device regardless of whether on the left side or on the right side of the fixing device the corresponding bone part is inserted.
  • The elastic clamping element, for example, a slot-shaped recess in which the one or more bars of the clamping device in Push a push of the elastic tensioning element. This gives you the same time an orientation of the elastic clamping element, since the slot-shaped recess as a guide for the elastic tensioning element acts.
  • Cheap is it, if at least one locking member is provided which the elastic clamping element in the inserted state against pushing out secures, and when the locking member by a limit exceeding displacement forces solvable is. Thus, the inserted elastic clamping element in the Although fixed position, but can by a relative great power be pulled out of the investment position.
  • For example the locking member by interlocking projections and recesses on the elastic Clamping element and are formed on the second contact element.
  • It is also advantageous if the support surface at its when pulling out front edge is formed rising upward. That makes it easier pulling out the elastic tensioning element, as the upwards rising, for example, upwardly bent edge acts as a sliding surface.
  • In similar Way you can be arranged on the side edges of the support surfaces Aufgleitflächen the insertion of the bone parts between the support surface and the first contact element facilitate.
  • Also at a detachable in this way elastic Tensioning element it is favorable if this one in the inserted state of the elastic clamping element laterally over the second contact element carries protruding handle.
  • This used to grasp the clamping element and on this handle can the clamping element from its clamping position between the bone parts and the second contact element to be pulled out.
  • at a further preferred embodiment is provided that the Support surface through the second contact element is formed.
  • In In this case, that must second contact element by the elastic clamping element against the first Investment element to be stretched, and also are all elastic Spring elements can be used, which are generally familiar to the skilled person.
  • It is cheap, if a stop is provided, the approach of the two contact elements limited under the action of the elastic tensioning element, so that the two Investment elements not completely pushed together by the elastic clamping element become. This is significant because the surgeon in this way the possibility has, the two abutment elements for application to the bone part elastic to push apart and the bone part between the contact elements to position.
  • For example the elastic tensioning element can be at least one elastically extensible Include tension member, which acts on both contact elements and this elastic pulls against each other.
  • there the tension member may be self-contained and both abutment elements externally enclose. It is also possible, that this Tension member between is arranged at the contact elements and with each one end is fixed to a respective investment element.
  • such Tension members can through rubber rings, rubber threads or similar Structures be formed, but also by coil springs and other elastic elastic tension members.
  • at Another preferred embodiment is the elastic clamping element at the top of the second contact element and is supported the clamping device from. In this case, the elastic tensioning element elastically compressed or deformed and exerts tension forces the second investment element.
  • So For example, the elastic tensioning element by at least a resilient part of the first contact element are formed, the is supported on the clamping device. For example, it can this is one or more of the second investment element worked out Act spring tongues.
  • at a preferred embodiment, the clamping device at least one held on the first contact element and the second contact element passing rod on and on this rod is a support member for the held elastic tensioning element.
  • there For example, it may be one on the rod only in the direction hold the clamping disc displaceable on the two contact elements, in the attached state of the fixing the two contact elements permanently against each other.
  • The terminator can in another embodiment may also be arranged at the free end of the rod, for example it is detachable to the end of the rod be plugged or unscrewed.
  • Especially For example, the elastic tensioning element may be a helical spring surrounding the rod be educated.
  • It is cheap, when the abutment elements are in the direction of the other abutment element pointing, pointed Fixiervorsprünge through which they enter the bone substance and thereby be held on the bone parts.
  • The fixing projections can across from be inclined to the clamping device of the two system elements. there is it cheap when the fixing projections are inclined towards each other, so if the distances between the fixing projections on the Investment elements is greater as the distances at the free ends of the Fixiervorsprünge. This will cause the lateral insertion the bone parts between the contact elements easier.
  • The following description of preferred embodiments of the invention used in conjunction with the drawings for further explanation. Show it:
  • 1 a perspective view of a first preferred embodiment of a fixing device with a between the bone parts and the second abutment element inserted bow spring;
  • 2 : a view similar 1 with pulled out bow spring and with a schematically illustrated device for clamping the two contact elements against each other;
  • 3 : a view similar 1 in a further embodiment of a fixing device with an elastic tensioning element held on tension rods;
  • 4 : a view similar 3 after removal of the elastic tensioning element and before placing a bridge to connect the two tension rods;
  • 5 : a view similar 1 in a further preferred embodiment of a fixing device with an elastically stretchable clamping element surrounding the two contact elements;
  • 6 : a view similar 5 arranged in a further preferred embodiment with between the contact elements, these elastically against each other exciting elastically stretchable clamping elements;
  • 7 : a view similar 5 with a coil spring surrounding a tensioning rod for elastic mutual clamping of the two contact elements;
  • 8th : a view similar 7 with a coil spring surrounding a tension rod and a support at the free end of the tension rod and
  • 9 : a view similar 7 with spring tongues in the second contact element for elastic mutual clamping of the two contact elements.
  • The fixing device shown in the drawing 1 serves the connection of two adjacent bone parts 2 . 3 , which are shown in the drawing only very schematically. These may be two plate-shaped parts of the skull bone, two parts of the sternum which are separated from one another by a saw cut, or similar bone parts which are to be fixed side by side relative to one another, wherein between the two bone parts 2 . 3 a narrow space 4 remains.
  • The fixing device 1 includes a rectangular, first abutment plate 5 and a second, also rectangular bearing plate 6 , Both investment plates carry at their longitudinal edges to each other bearing plate facing, substantially transversely projecting from the flat bearing plates, tooth-shaped projections 7 that in against the bone parts 2 . 3 tensioned investment plates 5 . 6 penetrate into the bone material and the bearing plates 5 . 6 against lateral displacement relative to the bone parts 2 . 3 to back up.
  • The first investment plate 5 is used to fix the bone parts 2 . 3 to the bottom of the bone parts 2 . 3 created, in such a way that they the space 4 bridged, and in the same way, the second bearing plate 6 to the top of the bone parts 2 . 3 created. If the two investment plates 5 . 6 in this position are vigorously stretched against each other, are the two bone parts 2 . 3 fixed against each other.
  • The first investment plate 5 carries two parallel juxtaposed and running perpendicular to the contact plate tension rods 8th . 9 located on the longitudinal center line of the first abutment plate 5 are arranged and the applied fixing device 1 through the gap 4 projecting outwards, preferably the width of the intermediate space 4 through the diameter of the tension rods 8th . 9 certainly. In the in the 1 and 2 illustrated embodiment, the two tension rods 8th . 9 at its free end by a bridge 10 connected to each other, the axially immovable on the tension rods 8th . 9 is held, for example, by a squeezing.
  • The tension rods 8th . 9 enforce the second bearing plate 6 that has two openings 11 . 12 having. The edges of these openings 11 . 12 are by radial cuts 13 in elastic tongues 14 divided. These tongues 14 bend elastically when the second abutment plate 6 towards the first attachment plate 5 is moved, while these tongues slide 14 on circumferential ribs 15 along, at the two tension rods 8th . 9 are arranged. It is possible, the second bearing plate 6 towards the first attachment plate 5 to move, but not in the opposite direction, since the tongues 14 prevent a return movement after elastic bending.
  • For applying the fixing of the 1 and 2 to a bone part 2 . 3 becomes the second investment plate 6 initially only slightly towards the first investment plate 5 moved so that the distance between the two investment plates 5 . 6 is significantly larger than the thickness of the bone parts to be fixed 2 . 3 , The fixing device 1 gets on one of the two bone parts 2 or 3 initially positioned so that the first bearing plate 5 gets the desired position, and then in the space between the top of this bone part and the bottom of the second abutment plate 6 a bow spring 16 inserted. This bow spring 16 consists of an elastically resilient band material and is bent in a U-shape so that it has two parallel arms 17 . 18 and one of these two arms 17 . 18 connecting, substantially circular curved web 19 having. The lower arm is at its free end in the form of a sliding surface 18a bent down.
  • Along the bow spring 16 this has a central slot 20 up, running through the entire jetty 19 to both arms 17 . 18 extends and whose width is at least as large as the diameter of the tension rods 8th . 9 , It is possible by the bow spring 16 with the jetty 19 ahead between the second bearing plate 6 and insert the top of the bone part, while the two tension rods occur 8th . 9 in the slot 20 one, at the same time as a guide for the bow spring 16 serves. The insertion depth is through the end of the slot 20 defined, with fully inserted bow spring 16 namely beats one of the two tension rods 8th . 9 at this end of the slot 20 at ( 1 ).
  • With a suitable distance of the second contact plate 6 from the first attachment plate 5 Tension this elastically compressible bow spring 16 the first investment plate 5 against the underside of the bone part, ie the bone part is between the lower arm 18 the bow spring 16 and the first attachment plate 5 clamped ( 1 ). The distance between the two contact plates 5 . 6 can by shifting the second bearing plate 6 towards the first attachment plate 5 be adjusted in a suitable manner, so that optionally also the spring force can be adjusted accordingly, with the fixing device 1 held on the bone part.
  • After fixation of the fixation device 1 on one of the two bone parts 2 can the other bone part 3 now laterally in the space between the lower arm 18 the bow spring 16 and the first attachment plate 5 be inserted until the bone part of the tension rods 8th . 9 strikes. This is the lower arm 18 the bow spring 16 feathers pushed up, so that the bone part also on the protruding projections 7 can slip past.
  • These projections 7 can be perpendicular from the two attachment plates 5 . 6 stand out, but it is also possible, these projections 7 slightly inward to incline, as this particular from the 5 to 9 is apparent. This introduces the insertion of bone parts between the first abutment plate 5 and the bow spring 16 facilitated.
  • Similarly, on the side edges of the lower arm 18 the bow spring 16 each an oblique inlet surface 21 be provided, which when pushing against each other of the bone parts 2 . 3 slides along the bones and thereby the lower arm 18 resiliently raises ( 1 and 2 ).
  • The fixing device 1 is by the bow spring 16 so against the bone parts 2 . 3 pressed that the first abutment plate 5 with their projections 7 in the bone parts 2 . 3 engages, and this results in a fixation of the fixation device on the bone parts 2 . 3 , It is therefore possible, after this fixation, the bow spring 16 to remove again, this is done simply by pulling out sideways. For this purpose, the bow spring carries 16 a grip 22 in the form of an obliquely upwardly bent tab on which the bow spring 16 be grasped by hand or by means of an instrument and then pulled out. Although this eliminates the elastic clamping force, the fixation device remains in this position, as it passes through the buried in the bone material projections 7 held in this position. After removal of the bow spring 16 is it possible with an in 2 only very schematically illustrated tensioning instrument 23 the two investment plates 5 and 6 against each other to tension. The tensioning instrument lies down to it 23 with an upper clamping tool 24 at the bridge 10 on and with a lower clamping tool 25 at the top of the second abutment plate 6 , When spreading the two clamping tools 24 and 25 This makes the second contact plate 6 towards the first attachment plate 5 along the two tension rods 8th . 9 shifted, and this leads to a final fixation of the two investment plates 5 . 6 on the bone parts 2 . 3 ( 2 ). Thereafter, the protruding parts of the tension rods 8th . 9 be removed, for example by means of a cutting tool, and the fixing device 1 remains in the body. The removed upper parts of the tension rods 8th . 9 with the bridge 10 and the bow spring 16 however, are removed from the operation area.
  • The upper arm 17 the bow spring 16 is in its middle area between the jetty 19 and its end up bulging ( 2 ), this bulge 17a engages with fully inserted bow spring 16 between the two breakthroughs 11 . 12 one slightly down over the second abutment plate 6 protrude. By this intervention of the bulge 17a between the two downwardly projecting openings 11 . 12 results in a determination of the bow spring 16 against displacement in the direction of the slot 20 ie the bow spring 16 is set in the inserted state. However, this determination can be solved by strong on the handle 22 is pulled, thereby the bulge slides 17a at the downwardly projecting opening 11 up and bend the upper arm 17 elastic down, so that the bow spring 16 completely out of the space between the bone part and the upper abutment plate 6 can be pulled out.
  • In the in the 3 and 4 illustrated embodiment, a similar structure is selected, corresponding parts carry therefore the same reference numerals.
  • At the two bars 8th . 9 the fixing device 1 , which at their free end over a bridge 10 are connected to each other, a spring arm is releasably 31 held, with the help of two clamping members 29 and 30 that the tension rods 8th . 9 partially surround. The spring arm consists of a band-shaped, elastically bendable material and has a step 26 on top of the bridge 10 rests when the spring arm 31 with the fixing device 1 connected is. The spring arm 31 has two straight, angularly adjoining sections 32 and 33 on, and at the lower end of the spring arm 31 this goes over into a parallel to the two investment plates 5 . 6 extending support plate 34 extending between the two investment plates 5 and 6 is and at her the spring arm 31 opposite longitudinal edge a right angle projecting edge region 35 having.
  • Due to the elastic properties of the spring arm 31 can the support plate 34 against the spring force of the spring arm 31 from the first attachment plate 5 be removed so that the fixing 1 can be applied to a bone part, that this between the support plate 34 and the first attachment plate 5 is clamped. The spring arm 31 presses the support plate 34 resilient against the top of the bone part and thereby clamps the first bearing plate 5 against the underside of the bone part, wherein the tooth-shaped projections 7 at least partially penetrate into the bone material. In this way, a fixing of the fixing device 1 possible at the bone part, wherein the second bearing plate 6 still at a distance above the bone parts 2 . 3 remains ( 3 ).
  • In a similar manner as in the embodiment of 1 and 2 then can the second bone part laterally between the support plate 34 and the first attachment plate 5 be inserted.
  • Before the two investment plates 5 . 6 finally firmly clamped against each other, is the spring arm 31 away. For this purpose, the clamping elements 29 . 30 bent. The dissolution process is supported by an upwardly projecting, flap-shaped extension 36 at which the spring arm 31 can be taken.
  • After removal of the spring arm 31 can the investment plates 5 . 6 in a similar manner as in the embodiment of 2 finally be stretched against each other.
  • In the embodiments of the 1 to 4 becomes the first investment plate 5 clamped by a clamping surface against a bone part, in the embodiment of 1 and 2 forms the lower arm 18 the clamping surface, in the embodiment of 3 and 4 the support plate 34 ,
  • In contrast, in the 5 to 9 Shown embodiments in which such a clamping surface through the second contact plate 6 itself is formed. In these cases, care is taken that the two bearing plates 5 . 6 be stretched elastically against each other and thereby fixing the fixing device 1 allow on a bone part.
  • The in the 5 to 9 illustrated fixation devices 1 are similar to those of the 1 to 4 Therefore, corresponding parts carry the same reference numerals. In contrast to the embodiments of the 1 to 4 is in the embodiments of 5 to 9 only a single tension rod 8th provided, but it would be readily possible, even these embodiments in a similar manner as in the embodiments of 1 to 4 to be provided with two tension rods.
  • In the embodiment of the 5 surrounds the two investment plates 5 . 6 an outside on this passed, self-contained elastic band 37 , In the simplest case, a rubber ring or a comparable elastic member made of a biocompatible material, such as silicone. To lay down this volume 37 this has a broadening 38 with an opening 39 on, this opening 39 lies directly above the opening 11 the second contact plate 6 so that the tension rod 8th also this opening 39 interspersed.
  • Through the band 37 become the two investment plates 5 . 6 stretched elastically against each other, a complete approach under the action of the elastic band 37 is thereby by a stepped broadening 40 of the tension rod 8th prevents this step-shaped widening 40 Closes immediately to the first attachment plate 5 and forms a stop for the second bearing plate 6 ,
  • In the embodiment of the 5 is the second investment plate 6 on the tension rod 8th freely displaceable in both directions, so the radial cuts are missing 13 and the tongue 14 which in the embodiments of the 1 to 4 are provided. This makes it possible, the distance between the two investment plates 5 . 6 against the action of the elastic band 37 to enlarge and adapt to the thickness of the bone parts.
  • For the final Gegeneinanderspannen the two investment plates 5 . 6 is on the tension rod 8th a locking disc 41 stored with a central opening 42 through which the tension rod 8th round picks. This opening 42 is similar to the opening 11 in the embodiments of the 1 to 4 They are radial cuts 13 provided that the locking disc 41 in the edge area of the opening 42 in a number of nebeneinan derlying resilient tongues 14 divide. In this way, the locking disc 41 as well as the second investment plate 6 in the embodiments of the 1 to 4 slidable from top to bottom, because of the circumferential ribs 15 but not from the bottom up.
  • The displacement of the locking disc 41 is done with a tensioning instrument, which is similar to the tensioning instrument 23 in the embodiment of 2 , in this case, the upper tool is then supported on a head-shaped thickening 43 of the tension rod 8th from. The elastic band 37 may after fixing the fixer 1 on the bone parts 2 . 3 be removed before the locking disc 41 is moved to the final clamping position, this distance can be done, for example, simply by cutting open the elastic band and pulled away laterally.
  • In the embodiment of the 6 a similar arrangement is chosen as in the embodiment of 5 Therefore, corresponding parts carry the same reference numerals.
  • In this case, the two investment plates 5 . 6 not stretched by a surrounding elastic band against each other, but by two elastic stretchable clamping elements 44 . 45 , with their ends in each case on both investment plates 5 . 6 are fixed and in the space between the two bearing plates 5 . 6 are arranged. The arrangement is chosen so that the two clamping elements 44 . 45 also in the space 4 the two bone parts 2 . 3 lie.
  • For the clamping elements 44 . 45 it can be tension springs or rubber-elastic bands.
  • Also these clamping elements 44 . 45 can be removed, in this case, the removal is still possible if the investment plates 5 . 6 through the locking disc 41 are completely stretched against each other.
  • The clamping elements 44 . 45 For example, through laterally open slots 46 in the investment plates 5 . 6 be used in these and are characterized by a head-shaped thickening 47 fixed in the axial direction. This makes it possible, the clamping elements 44 . 45 laterally out of these slots 46 pull out and thereby from the investment plates 5 . 6 to solve when the clamping elements 44 . 45 should be removed.
  • In the embodiment of the 7 a similar structure is chosen as in the embodiment of the 5 Therefore, corresponding parts carry the same reference numerals.
  • In this case, the two investment plates 5 . 6 not stretched by an elastic band against each other, but by a coil spring 48 that the tension rod 8th concentrically surrounds and on the one hand at the top of the second bearing plate 6 and on the other hand on the underside of the locking disc 41 supports and thereby the second bearing plate 6 elastic against the first contact plate 5 shifts.
  • In this embodiment, in the final clamping of the bearing plates 5 . 6 this coil spring 48 completely compressed, but it would also be possible, this coil spring 48 to remove, for example, characterized in that the thin spring wire wound coil spring 48 is pulled off laterally, so that the spring wire stretches.
  • A similar embodiment is realized in the embodiment of 8th ,
  • In contrast to the embodiment of 7 surrounds the coil spring 48 in this embodiment, the locking disc 41 in the distance and. relies on a stop 49 starting at the free end of the tension rod 8th is attached. The stop 49 For example, it can be clamped on the tension rod 8th be held or by a thread on which the stop 49 screwed on, or by a bayonet lock. This makes it possible to stop 49 after the positioning of the fixing device 1 to remove the bone parts and the coil spring 48 Pull off the top so that the tension rod 8th and the locking disc 41 in the from the 5 to 7 be released apparent manner. The stop 49 can go back to the tension rod 8th be placed on and then acts in a similar manner as the head-shaped thickening 43 as a stop for a tensioning instrument.
  • In the embodiment of the 9 , which is similar to the structure of the 5 and in which the same parts carry the same reference numerals again, are from the second bearing plate 6 punched by U-shaped cuts tongue-shaped areas which are bent upwards and the spring tongues 50 . 51 form. These are based on the lock washer 41 and thereby tighten the investment plates 5 . 6 resilient against each other. The distance can be as against the spring force of this spring tongues 50 . 51 be enlarged so that the fixing 1 pushed laterally on the bone parts or the bone parts between the investment plates 5 . 6 can be inserted. For final clamping of the bearing plates 5 . 6 becomes the locking disc 41 shifted down and bends while the spring tongues 50 . 51 far down, that the locking disc 41 on top of the second abutment plate 6 comes to the plant.

Claims (35)

  1. Surgical fixing device for mutual fixation of two adjacent bone parts with a first contact element for engagement with the underside of the two bone parts and with a second contact element for abutment with the upper side of the two bone parts and with a clamping device, the two contact elements connected by a gap between the bone parts through each other and the two contact elements permanently fixed against each other fixed when they rest against the underside or the top of the bone parts, characterized in that the fixing device ( 1 ) at least one elastic tensioning element ( 16 ; 31 ; 37 ; 44 . 45 ; 48 ; 50 . 51 ), which one on the top of the bone parts ( 2 . 3 ) engageable support surface ( 18 ; 34 ; 6 ) against the first contact element ( 5 ) so that the support surface ( 18 ; 34 ; 6 ) and the first investment element ( 5 ) against the force of the elastic tensioning element ( 16 ; 31 ; 37 ; 44 . 45 ; 48 ; 50 . 51 ) are removable from each other.
  2. Fixing device according to claim 1, characterized in that the support surface ( 18 . 34 ) Part of the elastic tensioning element ( 16 ; 31 ).
  3. Fixing device according to claim 2, characterized in that the support surface ( 18 ; 34 ) before applying the fixing device ( 1 ) to the bone parts ( 2 . 3 ) between the two investment elements ( 5 . 6 ) is arranged.
  4. Fixing device according to claim 2 or 3, characterized in that the elastic tensioning element ( 16 ; 31 ) with the fixing device ( 1 ) is releasably connected.
  5. Fixing device according to claim 4, characterized in that the elastic tensioning element ( 31 ) on the clamping device ( 8th . 9 ) is held.
  6. Fixing device according to claim 5, characterized in that the clamping device at least one on the first contact element ( 5 ) and the second investment element ( 6 ) penetrating rod ( 8th . 9 ) and that the elastic tensioning element ( 31 ) on this rod ( 8th . 9 ) is held.
  7. Fixing device according to claim 6, characterized in that the elastic tensioning element ( 31 ) at the free end of this rod ( 8th . 9 ) is held.
  8. Fixing device according to claim 6 or 7, characterized in that the clamping device comprises two juxtaposed rods ( 8th . 9 ) and that the elastic tensioning element ( 31 ) one the two bars ( 8th . 9 ) connecting bridge ( 26 ) having.
  9. Fixing device according to one of claims 6 to 8, characterized in that the clamping element ( 31 ) at least one clamping element ( 29 . 30 ) carrying the tensioning element ( 31 ) on the rod or rods ( 8th . 9 ) releasably.
  10. Fixing device according to one of claims 6 to 9, characterized in that the clamping element has a support surface ( 34 ) and the connection point with the clamping device ( 8th . 9 ), laterally on the second contact element ( 6 ) guided by spring arm ( 31 ) having.
  11. Fixing device according to one of claims 6 to 10, characterized in that the tensioning element ( 31 ) the tensioning device ( 8th . 9 ) superior handle ( 36 ) wearing.
  12. Fixing device according to claim 2 or 3, characterized in that the elastic tensioning element ( 16 ) on the second contact element ( 6 ) is supported.
  13. Fixing device according to claim 12, characterized in that the elastic tensioning element ( 16 ) to the bone parts ( 2 . 3 ) applied fixing device ( 1 ) laterally between the top of the bone parts ( 2 . 3 ) and underside of the second contact element ( 6 ) and laterally pushed out again.
  14. Fixing device according to claim 12 or 13, characterized in that the elastic tensioning element ( 16 ) is a bow spring.
  15. Fixing device according to claim 14, characterized in that the bow spring is U-shaped with a support surface forming the first arm ( 18 ) and one on the second contact element ( 6 ) attachable second arm ( 17 ) and with one the two arms ( 17 . 18 ) connecting, resilient web ( 19 ).
  16. Fixing device according to one of claims 12 to 15, characterized in that the clamping device at least one on the first contact element ( 5 ) and the second investment element ( 6 ) penetrating rod ( 8th . 9 ) and that the tensioning element ( 16 ) on both sides of the rod or rods ( 8th . 9 ) is arranged.
  17. Fixing device according to claim 16, characterized in that the tensioning element ( 16 ) a slot-shaped recess ( 20 ) into which the rod or rods ( 8th . 9 ) of the tensioning device during insertion of the elastic tensioning element ( 16 ) enter.
  18. Fixing device according to one of claims 13 to 17, characterized in that at least one locking member ( 17a ) is provided, which the elastic tensioning element ( 16 ) in the inserted state against pushing out secures, and that the locking member ( 17a ) is displaceable by a limit exceeding displacement forces.
  19. Fixing device according to claim 18, characterized in that the locking member by ineinan the groping forwards and backwards ( 17a . 11 . 12 ) on the elastic tensioning element ( 16 ) and at the second investment element ( 6 ) is formed.
  20. Fixing device according to claim 19, characterized in that the support surface ( 18 ) at its front edge when pulling out ( 21 ) is formed rising upward.
  21. Fixing device according to one of claims 13 to 20, characterized in that the elastic tensioning element ( 16 ) in the inserted state of the elastic tensioning element ( 16 ) laterally over the second contact element ( 6 ) projecting handle ( 18a ) wearing.
  22. Fixing device according to claim 1, characterized in that the support surface by the second contact element ( 6 ) is formed.
  23. Fixing device according to claim 22, characterized in that a stop ( 40 ) is provided, the approach of the two investment elements ( 5 . 6 ) under the action of the elastic tensioning element ( 37 ; 44 . 45 ; 48 ; 50 . 51 ) limited.
  24. Fixing device according to claim 22 or 23, characterized in that the elastic tensioning element has at least one elastically extensible tension member ( 37 ; 44 . 45 ), which on both investment elements ( 5 . 6 ) attacks and this elastic pulls against each other.
  25. Fixing device according to claim 24, characterized in that the tension member ( 37 ) is closed in itself and both investment elements ( 5 . 6 ) encloses on the outside.
  26. Fixing device according to claim 24, characterized in that the tension member ( 44 . 45 ) between both investment elements ( 5 . 6 ) is arranged and each having one end to a respective investment element ( 5 . 6 ).
  27. Fixing device according to claim 22 or 23, characterized in that the elastic tensioning element ( 48 ; 50 . 51 ) at the top of the second contact element ( 6 ) and is supported on the clamping device.
  28. Fixing device according to claim 22 or 23, characterized in that the elastic tensioning element by at least one resilient part ( 50 . 51 ) of the second contact element ( 6 ) is formed, which is supported on the clamping device.
  29. Fixing device according to claim 27 or 28, characterized in that the clamping device at least one on the first contact element ( 5 ) and the second investment element ( 6 ) penetrating rod ( 8th ) and that on the rod ( 8th ) a support member ( 41 ; 49 ) for the elastic tensioning element ( 48 ; 50 . 51 ) is held.
  30. Fixing device according to claim 29, characterized in that the support member has a support on the rod ( 8th ) only in the direction of the two contact elements ( 5 . 6 ) displaceable clamping disc ( 41 ), which in the applied state of the fixing device ( 1 ) the two investment elements ( 5 . 6 ) permanently against each other.
  31. Fixing device according to claim 29, characterized in that the support member ( 49 ) at the free end of the rod ( 8th ) is arranged.
  32. Fixing device according to claim 31, characterized in that the support member ( 49 ) on the free end of the rod ( 8th ) is detachably attached or screwed on.
  33. Fixing device according to one of claims 29 to 32, characterized in that the elastic tensioning element is a rod ( 8th ) surrounding coil spring ( 48 ).
  34. Fixing device according to one of the preceding claims, characterized in that the abutment elements ( 5 . 6 ) in the direction of the respective other investment element facing, pointed Fixiervorsprünge ( 7 ) wear.
  35. Fixing device according to claim 34, characterized in that the fixing projections relative to the clamping device of the two contact elements ( 5 . 6 ) are inclined.
DE200610021025 2006-04-28 2006-04-28 Surgical fixation device for two bone parts Expired - Fee Related DE102006021025B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200610021025 DE102006021025B3 (en) 2006-04-28 2006-04-28 Surgical fixation device for two bone parts

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE200610021025 DE102006021025B3 (en) 2006-04-28 2006-04-28 Surgical fixation device for two bone parts
EP07703578.0A EP2012688B1 (en) 2006-04-28 2007-03-02 Surgical fixing device for two bone parts
PCT/EP2007/001791 WO2007124807A1 (en) 2006-04-28 2007-03-02 Surgical fixing device for two bone parts
JP2009504582A JP5049339B2 (en) 2006-04-28 2007-03-02 Surgical fixation device for two bone parts
US11/787,113 US7867262B2 (en) 2006-04-28 2007-04-12 Surgical fixing device for two bone parts

Publications (1)

Publication Number Publication Date
DE102006021025B3 true DE102006021025B3 (en) 2008-01-03

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DE200610021025 Expired - Fee Related DE102006021025B3 (en) 2006-04-28 2006-04-28 Surgical fixation device for two bone parts

Country Status (5)

Country Link
US (1) US7867262B2 (en)
EP (1) EP2012688B1 (en)
JP (1) JP5049339B2 (en)
DE (1) DE102006021025B3 (en)
WO (1) WO2007124807A1 (en)

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Publication number Publication date
JP2009533107A (en) 2009-09-17
WO2007124807A1 (en) 2007-11-08
EP2012688A1 (en) 2009-01-14
US7867262B2 (en) 2011-01-11
US20070270856A1 (en) 2007-11-22
JP5049339B2 (en) 2012-10-17
EP2012688B1 (en) 2015-08-26

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